35 results about "Joint loading" patented technology

The invention belongs to the field of airplane design and relates to a method for a verification test of combined loading of an airframe and an undercarriage. The method is characterized in that firstly, assessment of a load is conducted; secondly, a loading scheme is designed; thirdly, loading is tested; the load of the undercarriage serves as an examination working condition of a full-aircraft static test, combined loading of the airframe and the undercarriage is achieved in the full-aircraft static test, and an airframe structure static strength design envelope under the special working condition of the undercarriage can be fully verified.

The invention relates to a test device for complex loading and united loading buckling of a submarine pipeline. The test device is used for testing a test pipeline (12) and comprises a main cabin (5), a lateral hydraulic rod device d, a front-end flange (13), two sets of rear-end flanges (11) and circular cylinders (9) with threads, wherein the lateral hydraulic rod device d is used for applying bending moment to the test pipeline (12); the rear-end flanges (11) and the circular cylinders (9) are matched with each other on the threads; the thread matched with the front-end flange (13) is arranged on an inward bulge part at the front end of the main cabin (5); the first set of rear-end flange (11) and circular cylinder (9) with threads has a thread pitch of the thread identical to the thread pitch of the front-end flange and is called as category I; the second set of rear-end flange (11) and circular cylinder (9) with threads has the thread pitch of the thread different from the thread pitch of the front-end flange and is called as category II. The test device can be used for simulating the practical operation environment of the full-size submarine pipeline in the paving and service periods.

The invention relates to a buffering device for bearing force of the human body leg joints and belongs to the technical field of joint health care. The buffering device for the bearing force of the human body leg joints comprises supporting mechanisms, suspender pants (19) and shoes. Each supporting mechanism comprises an upper knee joint supporting combination, a lower knee joint supporting combination and an ankle supporting combination. The suspender pants (19) comprise inner layers and outer layers. One set of the upper knee joint supporting combination and the lower knee joint supporting combination is arranged between the inner layer and the outer layer of a left pant leg, and one set of the upper knee joint supporting combination and the lower knee joint supporting combination is arranged between the inner layer and the outer layer of a right pant leg. The ankle supporting combinations are arranged on heel parts inside the shoes. A patient wears the suspender pants (19) and the shoes where the ankle supporting combinations are installed, so that the bottoms of the heels of the human body make slight contact with heel bottom plates (18) when the heels of the shoes touch the ground because a certain distance is formed between the bottoms of the heels of the human body and the heel bottom plates (18). Under the action of the supporting mechanisms, the acting points of the weight of the human body are formed on the roots of the thighs and the hips, so that the bearing force of the leg joints is greatly reduced, and pains of the legs are relieved.

The invention discloses a spinal biomechanics measurement multi-angle loading device, which comprises a pedestal, an experiment table, a rotating and bending loader, a vertical loader, a front-and-back loader and a left-and-right loader, and is characterized in that the rotating and bending loader and the left-and-right loader have a clamping function and can perform effective fixation on a spinal creature, and each loader is driven by a motor to perform loading. The spinal biomechanics measurement multi-angle loading device can perform force loading on a spinal creature from six angles, and can realize separate loading and joint loading, thereby providing a basis for the study of the spinal biomechanics, and being simple in operation. The spinal biomechanics measurement multi-angle loading device is suitable for being widely applied in the technical field of medical instruments.

A test system for testing the fatigue performance of the helicopter main propeller girder, which consists of a helicopter main propeller girder root specimen, a process joint, a loading joint, a test bench, a vibration exciter, a motor, an electric control cabinet, a hydraulic system, a hydraulic control cabinet, a strain One end of the helicopter main propeller girder specimen is installed on the process joint; the process joint is installed on the test bench; the other end of the helicopter main propeller girder specimen is installed on the loading joint; It is connected with the loading joint and installed on the test bench; the motor is connected with the exciter and the electric control cabinet; the hydraulic system is connected with the loading joint and the hydraulic control cabinet; the strain gauge is pasted on the corresponding position of the helicopter main rotor girder test piece; the dynamic strain The instrument is connected with the strain gauge; the optical oscilloscope is connected with the dynamic strain gauge. The invention has simple structure and convenient operation, and is used for the fatigue performance test of the main propeller girder of the helicopter, and the test result has important engineering application value for the evaluation of the fatigue life of the structure.